A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 6645-01-280-4373
NSN 4140-01-213-9199
NSN 5925-01-612-8081
NSN 5835-01-226-0714
NSN 6110-00-107-1664
NSN 6110-01-603-7527
NSN 6645-01-538-0425
NSN 6685-00-906-6434
NSN 4140-00-833-5068
NSN 5930-01-192-7912
NSN 4140-01-196-6331
NSN 5935-01-412-1654